Definition of pentene in US English:

pentene

noun

Chemistry
  • Each of a number of isomeric liquid alkenes with the formula C₅H₁₀; especially either of the straight-chain isomers CH₂=CH(CH₂)₂CH₃ ("1-pentene") or CH₃CH=CH(CH₂)CH₃ ("2-pentene").

Origin

Late 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From penta- + -ene.

Pronunciation

pentene

/ˈpɛntiːn/